PIETRO FIORENTINI REFLUX 819/FO, Technical Manual

Page: 40 / 93

TECHNICAL MANUAL MT103
40
PROBLEM POSSIBLE CAUSES APPARATUS REMEDY
Reinforced gasket [7] damaged Replace
Tightness
Obturator guide ring [35] damaged
Regulator (Fig. 26)
Replace
failure Q=0
Ice formation between the seat and the plug Increase the gas inlet temperature to
the regulator
Diaphragm [20] ruptured R14/A/FO Replace
Diaphragm [10] ruptured Pre-regulator (Fig. 28) Replace
Occlusion by dirty Check cartridge [13] filtering level
Reinforced gasket [9] swollen Replace
Obturator [17] damaged Replace
Obturator [17] stuck in the open position 204/A/FO Pilot Control and clean if necessary
Spring [21] yielded (Fig. 27) Replace
Pressure
increase with Q>0
Reinforced gasket [7] damaged Replace
Ice formation between the seat and the plug Increase the gas inlet tem. to
the regulator
Dirt between the reinforced gasket and the Clean and check gas filtering
obturador Regulator
Obturator blocked (Fig. 26) Clean and check movement
Diaphragm fixed incorrectly Fix
Diaphragm ruptured (50) Replace
Obturator guide ring [35] damaged Replace
Diaphragm [50] ruptured Replace
Feed too low Replace the spring [12]
Filter cartridge [13] dirty Replace
Occlusion by temperatura R14/A/FO Increase inlet temp. to the preregulator
Occlusion by dirty Pre-regulator Check cartridge [13] filtering level
Reinforced gasket [9] swollen (Fig. 28) Replace
Pilot feed line broken Repair
Pressure drop
Diaphragm [16] ruptured 204/A/FO Pilot Replace
Motorisation line to the regulator broken (Fig. 27) Repair
Obturator blocked Clean and check movement
Diaphragm [50] ruptured Replace
Guide ring [36] damaged Regulator (Fig. 26) Replace
No pressure upstream Check cleanliness of line filter
cartridges
6.1 Tab. 10 REGULATOR (FIG. 26-27 and 28)
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